LED lighting fixtures

Abstract

In long, base-type lighting fixtures that are attached to building materials such as ceilings, the structure in which a long light-emitting element is enclosed and housed in a recess in the main body fixed to the ceiling results in a large number of parts and increased weight, making it uneconomical. [Solution] The mounting plate for installation on the ceiling is made of a substantially flat plate, and the LED lighting fixture body, which includes a power circuit, LED board, and power unit, is attached to the base plate and then secured to the mounting plate. The mounting plate has only the function and structure of fixing the LED lighting fixture body to the ceiling, and structurally it can be made with the minimum number of components, and installation is simple, requiring only hooking and screwing work, thus providing a lightweight LED lighting fixture with few parts and easy installation.

Description

Technical Field

[0001] The present invention relates to an LED lighting fixture for lighting installed on a ceiling or the like.

Background Art

[0002] Conventionally, as disclosed in Patent Document 1 below, in paragraph 0037, a recess 10a is provided in the main body 10. The recess 10a is clearly stated to be for accommodating the LED unit 2. That is, it has a configuration in which the separate LED unit 2 is accommodated in the recess 10a which is a part of the main body.

[0003] Next, as disclosed in Patent Document 2 below, in paragraph 0011, it is clearly stated that it includes a horizontally long and elongated fixture main body 1, a light source unit 2 and a lighting device 3 disposed on this fixture main body 1, and a locking member 4 for attaching and holding the light source unit 2 to the fixture main body 1. Further, in paragraph 0012, it is clearly stated that the accommodation recess 11 is composed of a top plate portion 11a and side walls 11b formed by being bent perpendicularly from both sides of this top plate portion 11a toward the front side.

[0004] From this, the light source unit 2 which is separate from the fixture main body 1 has a configuration of being accommodated in the accommodation recess 11 which is a part of the fixture main body 1.

[0005] Also, as disclosed in Patent Document 2 below, in paragraph 0024, the lighting device 3 is attached inside the top plate portion 11a of the accommodation recess 11 of the fixture main body 1. The lighting device 3 is configured by accommodating a circuit board and circuit components mounted on this board in a box-shaped case, and is connected to a commercial AC power supply AC, and is clearly stated to receive this AC power supply AC and generate a DC output. The lighting device 3 which is a power supply circuit is attached to the fixture main body 1 and has a configuration separated from the light source unit 2 which is an LED light emitting portion.

[0006] This structure applies to LED lighting the same design used in the era when fluorescent tubes were originally used for lighting. It inherits the basic structure of attaching a fluorescent tube to the lighting fixture body, but instead attaches the light source unit 2, which is an LED light-emitting module, to the lighting fixture body.

[0007] Furthermore, as disclosed in Patent Document 3 below, paragraph 0024 explicitly states that the lighting device 3 is mounted on the inside of the top plate portion 11a in the housing recess 11 of the fixture body 1.

[0008] Furthermore, paragraph 0027 states that the light source unit 2 is attached to the locking member 4 configured in this way, as shown in Figure 5. In other words, it is clearly stated that the light source unit 2 is positioned to cover the opening side of the housing recess 11.

[0009] In other words, the lighting device 3 is fixed to the main body 1 and is separate from the light source unit 2, requiring an electrical connection. Originally, this was the structure of a lighting fixture using a fluorescent tube, and this design inherits that structure, with the lighting device 3, which is the power supply circuit, built into the main body 1 and separate from the light-emitting unit 2.

[0010] In the above structure, the LED light-emitting module and power supply unit, or only the light-emitting module, which are functions of conventional fluorescent tubes, are separated from the lighting body in the same way as a fluorescent tube. However, while fluorescent tubes are standardized and interchangeable, making their separation convenient, LED light-emitting units have different specifications depending on the manufacturer and are not interchangeable, yet the separation structure is the same as that of a fluorescent tube, which presents a problem. [Prior art documents] [Patent Documents]

[0011] [Patent Document 1] Japanese Patent Publication No. 2017-103248 [Patent Document 2] Japanese Patent Publication No. 2016-136535 [Patent Document 3] Japanese Patent Publication No. 2014-78425 [Overview of the project] [Problems that the invention aims to solve]

[0012] The problem that this invention aims to solve, in view of the above-mentioned problems, is to provide a structure that simplifies the structure of the main unit while simultaneously reducing costs and the weight of the main unit, thereby reducing the risk in the event of an accidental fall, by integrating incompatible light-emitting modules with the power supply circuit and integrating the LED light-emitting module with the lighting unit. [Means for solving the problem]

[0013] The present invention provides an LED lighting fixture comprising: a base plate formed in a substantially planar and substantially rectangular shape; LED substrates arranged in two parallel rows with a gap in the longitudinal direction of the base plate; a light source cover arranged parallel to the LED substrates and covering the LED substrates from below in the longitudinal direction along the LED substrates; a power supply unit formed by a power supply board and a power supply case housing the power supply board, arranged longitudinally between the light source covers; an outer cover extending longitudinally and detachably positioned between the light source covers, enclosing the power supply unit; and end caps covering both longitudinal ends of the light source covers, wherein the base plate is fixed to a fixing plate fixed to a structure such as a ceiling.

[0014] This reduces the number of parts in LED lighting fixtures and lowers their overall weight, thereby reducing the risk of injury or damage in the event of an accidental fall.

[0015] Furthermore, the present invention provides an LED lighting fixture configured such that an LED substrate is temporarily fixed by sliding it longitudinally and hooking it onto a plurality of locking parts provided on a base plate, and the base plate is sandwiched by fixing end caps to both ends of the light source cover, while at the same time preventing the LED substrate from disengaging from the locking parts and holding it in a predetermined position.

[0016] This allows for weight reduction by integrating the LED circuit board with the LED lighting fixture.

[0017] Furthermore, the present invention provides an LED lighting fixture in which the power supply unit is configured such that one end near the center in the longitudinal direction is engaged with a base plate, and the other end is held by an end cap.

[0018] This simplifies the method of fixing the power supply unit, reducing the number of parts and lowering the labor required.

[0019] Furthermore, the present invention provides an LED lighting fixture in which the outer cover has a cross-sectional shape perpendicular to the longitudinal direction, forming a protective surface in a substantially horizontal direction, locking claws extend upward from substantially both ends of the protective surface, sandwiching the power supply unit, and the locking claws are provided with protruding claws facing outward in the horizontal direction, and recessed grooves are provided on the opposing inner walls of the parallel-arranged light source covers so that the protruding claws can be detachably engaged.

[0020] This allows for easy installation of LED lighting fixtures by simply attaching and detaching the outer cover, thereby reducing installation time.

[0021] Furthermore, the present invention provides an LED lighting fixture in which a plurality of L-shaped claws are formed on the fixing plate by cutting and bending them so that they are inside the inner wall of the light source cover and outside the power supply case, and slit-shaped holes are provided at opposing positions on the base plate to lock them in place, and the base plate and the fixing plate are attached together.

[0022] This allows LED lighting fixtures to be installed in structures by simply screwing in the fixing plate and then hooking the base plate onto it for temporary fastening, and then further securing them with screws, thus shortening the installation time.

[0023] In addition, the present invention provides an LED lighting fixture configured such that for a suspension bolt provided to hang down in parallel from a building structure, a through hole is provided in a fixing plate through which nuts respectively engaged with the tips of the suspension bolts at the same interval as the suspension bolts pass, a long hole is provided extending in the same direction in the longitudinal direction of the fixing plate from the through hole, the width of the long hole is larger than the diameter of the suspension bolt and smaller than the diameter of the circumcircle of the nut, a clearance hole having the same width as the diameter of the through hole and the same length as the through hole and the long hole combined is provided in a base plate at a position facing the through hole and the long hole, and a continuous hole having the same width as the diameter of the through hole and the same length as the through hole and the long hole combined and communicating with the through hole is provided in a power supply unit.

[0024] Thereby, after fixing the fixing plate to the suspension bolt with a nut, the fixing work can be completed by directly fixing the LED lighting fixture to the fixing plate, and the construction time can be shortened.

[0025] In addition, the present invention provides an LED lighting fixture configured such that a light source cover is formed by extrusion molding, a cross-sectional shape perpendicular to the longitudinal direction of a pair of the light source covers positioned in parallel is symmetric with respect to a vertical line, the shape can be created by the same extrusion molding, cover engaging claws are provided in parallel facing each other in the longitudinal direction symmetrically to the left and right near the center of the base plate in the cross-sectional shape, the inner ends of the light source covers arranged in parallel are engaged, and the outer ends of the light source covers are engaged outside the base plate.

[0026] Thereby, the assembling process of the light source cover and the base plate can be assembled only by sliding the inner bending part and the outer bending part of the light source cover to fit with the engaging claws, so there is an effect of reducing the man-hour.

[0027] Furthermore, the present invention provides an LED lighting fixture in which a concave groove is provided in the middle of the inner wall of the light source cover, which has a cross-sectional shape perpendicular to the longitudinal direction, and a screw hole portion with a C-shaped cross-sectional shape is provided on the opposite side of the groove, and a fixing hole is provided in the end cap at a position that communicates with the screw hole portion, and the end cap is attached to the screw hole portion, thereby fixing and holding both ends of the light source cover in the longitudinal direction with the end cap.

[0028] This makes the thickness of the recessed grooves and the C-shaped screw holes in the light source cover nearly uniform, reducing quality issues such as sink marks.

[0029] Furthermore, the present invention provides an LED lighting fixture configured to allow a tool or the like to hook onto notches provided at both ends in the longitudinal direction of the outer cover or at positions facing the outer cover of the end cap, thereby disengaging the protruding claws of the outer cover that are engaged with the concave groove of the light source cover.

[0030] This makes it easy to attach and detach the exterior cover when installing LED lighting fixtures, thus shortening installation time. [Effects of the Invention]

[0031] By integrally fixing the LED circuit board and power supply unit to the base plate, the number of components in the LED lighting fixture can be reduced, thereby reducing the weight of the LED lighting fixture.

[0032] Furthermore, since installation on structures can be done simply by attaching and detaching the exterior cover, construction time can be reduced.

[0033] Furthermore, by having the LED boards in parallel, even if one fails, the other LED board may continue to maintain the lighting function, thus reducing the risk of complete blackout. [Brief explanation of the drawing]

[0034] [Figure 1] This is a perspective view of an LED lighting fixture according to one embodiment of the present invention. [Figure 2] This is an exploded view of an LED lighting fixture according to one embodiment of the present invention. [Figure 3] This is a cross-sectional view in the short direction of an LED lighting fixture according to one embodiment of the present invention. [Figure 4] This is a partially exploded view showing the positional relationship between the base plate and the fixing plate of an LED lighting fixture according to one embodiment of the present invention. [Figure 5] This is an assembly drawing of the base plate and LED substrate of an LED lighting fixture according to one embodiment of the present invention. [Figure 6] This is an assembly diagram of the base plate and light source cover of an LED lighting fixture according to one embodiment of the present invention. [Figure 7] This is an exploded perspective view of the end cap of an LED lighting fixture according to one embodiment of the present invention. [Figure 8] This is a perspective view showing the attachment and detachment of the exterior cover of an LE lighting fixture according to one embodiment of the present invention. [Figure 9] This is a partial bottom view of an LED lighting fixture according to one embodiment of the present invention. [Figure 10] This is a perspective view showing the fastening of the base plate and fixing plate of an LED lighting fixture according to one embodiment of the present invention. [Figure 11] This is a partial perspective view of the base plate and LED substrate of an LED lighting fixture according to one embodiment of the present invention. [Figure 12] This is a partial cross-sectional view of the base plate and LED substrate of an LED lighting fixture according to one embodiment of the present invention. [Figure 13] This is a partial cross-sectional view of the base plate and power supply case of an LED lighting fixture according to one embodiment of the present invention. [Modes for carrying out the invention]

[0035] The LED lighting fixture of the present invention comprises a base plate formed in a substantially planar and substantially rectangular shape, two parallel LED substrates arranged with a gap in the longitudinal direction of the base plate, a light source cover arranged parallel to the LED substrates and covering the LED substrates from below in the longitudinal direction along the LED substrates, a power supply unit formed by a power supply board and a power supply case housing the power supply board, an outer cover that encloses the power supply unit and is detachably arranged between the light source covers and extends in the longitudinal direction, and end caps that cover both ends of the light source cover in the longitudinal direction. The base plate is fixed to a fixing plate fixed to a structure such as a ceiling, resulting in an LED lighting fixture with a small number of parts and easy installation. [Examples]

[0036] Figures 1 to 11 show LED lighting fixtures according to embodiments of the present invention. Details will be described with reference to the drawings. Note that this embodiment is just one example and is not limiting. First, the constituent elements are explained, followed by their operation, manipulation, and effect.

[0037] 1. Conventional base lighting installation Traditionally, base lighting fixtures have been divided into a main body and a light source. The main body is fixed to the ceiling, and the light source is detachable from the main body. The light source is often supplied as a replacement part. During installation, the work is completed by installing the main body on the ceiling, and the installation of the light source only involves connecting a connector, making it possible for even ordinary workers to install. Thus, conventional base lighting fixtures are generally divided into a main body and a light source, and installation is carried out with the parts separated, with the light source being connected at the end.

[0038] Conventional base lighting fixtures are constructed by suspending the fixture body from suspension bolts installed on the ceiling, ensuring the entire fixture is in close contact with the ceiling. Furthermore, base lighting fixtures have holes for guiding indoor wiring from the ceiling into the room, and are separated into a main body containing the power circuit and a light source containing LEDs or other light-emitting elements. The main body is fixed to the ceiling, while the light source is detachable from the main body. The main body and the light source are electrically connected via a connector.

[0039] 2. Base lighting installation according to the embodiment of the present invention In this embodiment, the component corresponding to the light source of a conventional base lighting fixture is the LED lighting fixture body, which includes an LED substrate, a light source cover, and a base plate.

[0040] During installation, the electrical work is completed once the LED lighting fixture is mounted to the ceiling. The outer cover, described later, is locked in place by pushing it in from below, so the process is the same as closing a regular lid. Furthermore, since the installation mainly involves hooking and screwing, it is simpler than the installation of conventional base lighting.

[0041] This significantly reduces installation time when there is a large number of LED lighting fixtures to be installed throughout the entire building.

[0042] 3. Structure of LED lighting fixtures Conventional base lighting required two structures: the main body and the light source. This resulted in a relatively large number of component parts. In contrast, this embodiment uses a simple fixing plate to which the base plate is temporarily attached, and then secured with a single screw. Since the power supply unit is also mounted to the base plate, the structure is integrated, reducing the number of components.

[0043] 4. Fixed plate The main body of a conventional base light fixture corresponds to the mounting plate. The mounting plate, formed by press-forming sheet metal, is roughly rectangular and made of sheet metal with a flat surface. The ceiling side is flat and designed to be in close contact with the ceiling. On the other hand, the bottom side has four rows of L-shaped claws formed in the longitudinal direction, cut and bent vertically downwards.

[0044] The fixing plate has a pair of through holes near both ends in the longitudinal direction, through which suspension bolts (not shown) pass during installation. The through holes are circular, and their diameter is such that nuts (not shown) attached to the suspension bolts can pass through. Elongated holes extend from the pair of through holes in the same direction along the longitudinal direction. The longitudinal dimension of the elongated holes is the same as the engagement allowance of the L-shaped claws described above. Furthermore, the width of the elongated holes is larger than the diameter of the suspension bolts but smaller than the diameter of the circle through which the nuts can pass. This dimension is set so that the suspension bolts can pass through, but the nuts cannot pass through and get caught, thereby locking and holding the base plate in place.

[0045] The mounting plate is a roughly rectangular flat plate, and a circular wiring pass-through hole with a diameter of approximately 20 mm is provided near the center of the mounting plate, with the edges treated by curling or other processes. During installation, wires branched from the indoor wiring pass through this hole to supply electricity to the LED lighting fixture. The mounting plate corresponds to the main body of a conventional base lighting fixture. The lower surface of the mounting plate maintains a generally flat state except for the L-shaped claws. A tapped stopper is formed in the center of the lower end of the mounting plate, which has a downward convex shape near the center.

[0046] Mounting holes are provided near both ends of the long side of the mounting plate, and approximately in the center of the short side. These are for direct mounting to the ceiling in the absence of suspension bolts.

[0047] 5. Base plate The roughly rectangular base plate, formed by press-forming sheet metal, is the central component in the assembly of the LED lighting fixture. By attaching the LED circuit board, power supply unit, and light source cover to the base plate, it functions as the light source section of a conventional base light fixture.

[0048] The upper surface of the base plate is formed to be approximately flat as it is installed in contact with the fixing plate. The lower surface of the base plate has two rows of inward and outward bends, parallel to the longitudinal direction and distributed in the transverse direction, created by cutting and bending, in order to secure the light source cover. The inward and outward bends form the locking mechanism.

[0049] The inner bend is formed by cutting and bending the tip of the base plate at a right angle from the outside in the short direction to the inside, creating a receiving surface. The outer bend is formed by cutting and bending the tip of the base plate at a right angle from the inside in the short direction to the outside, creating a receiving surface.

[0050] The tips of the inner and outer bends face each other. Two rows of these inner and outer bends are formed along the longitudinal direction of the base plate. In the cross-section along the short direction, the processing of the two rows of inner and outer bends is symmetrical. The opposing inner and outer bends may be arranged in a staggered pattern.

[0051] Approximately in the center of the base plate, a guide hole is provided opposite the wiring passage hole of the fixing plate. Opposite the through hole and elongated hole of the fixing plate, a relief hole is provided whose length is the combined length of the through hole and elongated hole in the longitudinal direction and whose width is the same as the diameter of the through hole. Slit-shaped holes are provided in the base plate corresponding to each L-shaped claw of the fixing plate for inserting and sliding in the longitudinal direction. The guide hole is also elongated in the longitudinal direction by a length corresponding to the distance the L-shaped claw slides after being inserted into the slit-shaped hole. Opposite the set tap of the fixing plate, a protruding screw base is formed, which is elongated in the longitudinal direction by a length equal to the distance the L-shaped claw slides through the slit-shaped hole, and a set hole is provided in the screw base opposite the set tap, allowing it to be screwed in.

[0052] Near both ends of the base plate in the longitudinal direction, relief holes are provided that are approximately in the center of the short direction and opposite the direct mounting holes of the fixing plate. These relief holes have a length equal to the length by which the slit-shaped holes slide when set into the L-shaped claws.

[0053] 6. LED board The LED substrate is formed in a roughly rectangular shape on its outer diameter. The upper surface is formed in a roughly flat state with an electrically insulating material. An electrical circuit is formed on the lower surface using copper foil, and the LED elements, which are light-emitting elements, are electrically connected by solder or the like. The distance between the inner and outer bends of the base plate is slightly larger than the length of the LED substrate, and also slightly larger than the thickness of the LED substrate in the vertical direction. Therefore, the LED substrate is inserted and housed between the receiving surface, which is formed by horizontally bending the tips of the inner and outer bends, and the lower surface of the base plate.

[0054] The tips of the inner and outer bends are formed to maintain a sufficient insulating distance from the electrical circuit of the copper foil on the LED substrate. The distance between the receiving surfaces of the inner and outer bends and the lower surface of the base plate is slightly greater than the thickness of the LED substrate, but by forming a part of the receiving surface convex upwards to create a push-up section, the LED substrate is pushed up from below, and the upper surface of the LED substrate is pressed against the base plate.

[0055] By providing a push-up section on the receiving surface, inserting the LED board between the receiving surface and the lower surface of the base plate becomes easier because the dimensions of the receiving surface and the lower surface of the base plate are greater than the thickness of the LED board. Furthermore, once the LED board is inserted into the receiving surface, the push-up section presses the LED board against the lower surface of the base plate, efficiently transferring the heat generated by the LED board when power is applied to the base plate.

[0056] The LED elements located on the underside of the LED substrate emit light downwards. The longitudinal dimensions of the LED substrate are designed to be slightly smaller than the longitudinal dimensions of the base plate. Both ends of the LED substrate in the longitudinal direction are held in place by the base plate and prevented from moving by end caps, which will be described later.

[0057] 7. Power supply unit A roughly rectangular power supply case, positioned approximately in the center of the base plate in the short direction and extending in the longitudinal direction, engages with a longitudinally projecting insertion part formed at one end of the power supply case in the longitudinal direction by inserting it into a louvered part formed on the base plate by louver processing or the like. The other end is held by an end cap, described later, and is fixed while maintaining contact with the base plate.

[0058] The power supply board is housed in a power supply case. The power supply board and the power supply case form a power supply unit. Power wires (not shown) are routed through wiring holes and connected to terminal blocks attached to the power supply board, supplying commercial power to the power supply board. Terminal blocks generally have connecting members using elastic pieces and are configured for one-touch connection.

[0059] The power supply board supplies DC power to the LED board and also controls the LED board and the LED lighting fixture itself. The power supply case has a cylindrical continuous hole that is roughly elongated in shape, extending from the bottom to the top. The continuous hole is located where the suspension bolts (not shown) pass through, overlapping with the through holes in the fixing plate and the relief holes in the base plate. An insulating wall is provided to prevent the power supply board from coming into contact with the suspension bolts. When installed with suspension bolts, the insulating wall protects the power supply board from the suspension bolts and nuts.

[0060] 8. Light source cover The LED substrate is secured to the receiving surface of the base plate, with the LED elements facing downwards. To protect the LEDs and diffuse the light from the LED elements, a light source cover is provided that covers the underside of the LED substrate and is held by the base plate. The light source cover is configured to cover each LED substrate parallel to the longitudinal direction of the base plate. The material of the light source cover is a transparent resin material containing a light diffusing agent. The cross-sectional shape of the light source cover in the short direction is almost identical to the shape that is symmetrical with respect to the center of the base plate, distributed to the left and right.

[0061] Near the center line in the shorter direction of the base plate equipped with the light source cover, a concave space is provided between the light source cover and the base plate to accommodate the power supply unit, so the inner wall of the light source cover is located outside the power supply unit. In addition, the power supply cover has an open top end, and the top end is in close contact with the base plate.

[0062] In the cross-section along the shorter side of the light source cover, the light-transmitting surface of the light source cover slopes upward from the lower end of the inner wall outwards, forming a transparent surface that extends to the edge of the base plate. Light emitted from the LED element mainly passes through the transparent surface and is emitted into the room. The outer end of the light source cover has a cross-sectional shape that fits into the edge of the base plate. On the other hand, the inner end of the light source cover engages with cover engagement claws, which are formed by cutting and bending the base plate at a right angle towards the center at a position outside the power supply unit in the cross-section along the shorter side. Multiple cover engagement claws are formed and arranged linearly in the longitudinal direction. Furthermore, the cover engagement claws are arranged symmetrically on both sides in the cross-section along the shorter side of the base plate.

[0063] In the cross-section along the shorter side, the edges of the base plate face outward, and the cover engagement claws are bent towards the center. Therefore, the outer edge of the light source cover engages with the edge of the base plate facing outward, while the inner edge of the light source cover engages with the cover engagement claws bent towards the center. Consequently, the light source cover is locked to the base plate. During assembly, it is assembled by inserting it in the longitudinal direction.

[0064] Since the light source cover is formed by extruding and cutting a resin material, any cross-sectional shape in the short direction is identical. The outer end of the light source cover engages with the base plate end, while the inner end engages with the cover engagement claw, so it can be fixed in place by restricting its movement in the longitudinal direction. Both ends of the light source cover in the longitudinal direction are held in place by end caps, which will be described later.

[0065] When a screw is passed through the fixing hole of the end cap (described later), it will be coaxial with the C-shaped screw hole located on the LED substrate side of the inner wall of the light source cover.

[0066] The light source cover consists of a pair of light source covers whose cross-section in the shorter direction is horizontally symmetrical. Since both light source covers can be formed from the same material, efficient production activities are possible in the manufacturing of the light source covers by mass-producing identical parts.

[0067] The sides of the LED substrate in the light source cover maintain the polished surface condition of the mold. The opposite side (exterior surface) from the LED substrate has a textured surface that diffuses light through refraction. Light passing through the light source cover is irradiated symmetrically to the vertical center plane in the longitudinal direction of the LED lighting fixture, and the light transmitted through the light source cover is radiated throughout the entire room.

[0068] 9. End caps End caps are fixed to both ends of the light source cover in the longitudinal direction. The projection shape of the end caps onto the base plate in the longitudinal direction is a trapezoid with the longer side on the ceiling side and the shorter side on the floor side. The inclined sides along the light source cover have a symmetrical inclination with respect to the central vertical line.

[0069] The end caps consist of a pair of identical caps at both ends. The end caps are secured by screwing them into the screw holes of each light source cover through the fixing holes, so that the pair of light source covers are sandwiched between the end caps. The light source covers and end caps form the skeletal structure of the LED lighting fixture, and the base plate is held in place while engaged with the light source covers.

[0070] The outer surface of the end cap is mostly flat except for the presence of fixing holes. The inner surface is provided with retaining ribs and bosses for holding the base plate, LED board, light source cover, and power supply unit, and holds each component during assembly. In addition, guide recesses (not shown) are formed for routing lead wires (not shown) that electrically connect the power supply board and the LED board.

[0071] 10. Outer cover The outer cover is detachably held in place by being sandwiched between the inner walls of a pair of light source covers. Two locking claws extend upward parallel to the inner walls of the light source covers from a protective surface formed on a nearly horizontal surface near the center of the outer cover. The tips of the locking claws are provided with protruding claws facing in opposite directions. The outer cover is detachably set onto the LED lighting fixture body by first inserting the locking claws into the space between the pair of light source covers. The outer cover is held in place by the protruding claws of the outer cover fitting into the concave grooves on the inner walls of the light source covers.

[0072] The outer cover is removed by inserting a tool such as a flathead screwdriver into a concave notch located approximately in the center of the end cap where it contacts the outer cover, and disengaging the protruding claw of the locking claw from the concave groove. Due to the elasticity of the resin material, the protruding claw of the locking claw disengages from the concave groove at one end of the outer cover, and the entire cover can then be pulled off.

[0073] 11. Assembly of LED lighting fixtures The operation, handling, and effects of the above components are described below. During the assembly of the main body, the LED board is engaged with the base plate by inserting it between the inner and outer bends of the base plate. The outer end of the light source cover is inserted along the longitudinal direction into the short end of the base plate, and at the same time, the inner end of the light source cover is inserted longitudinally into the cover engagement claws. Since the cross-sectional shape of the pair of light source covers is the same, only two identical light source covers need to be prepared. By inserting the light source cover from opposite ends, a symmetrical cross-sectional shape can be achieved in the short-side cross-section of the base plate.

[0074] Once the power supply board is placed in the power supply case and the power supply unit is complete, insert the power supply unit's connector into the louvered section of the base plate. Temporarily place it on the base plate.

[0075] The end caps are attached to both ends of the light source cover by setting them on the cover and using retaining bosses to guide the fixing holes into the screw holes, then screwing them into the screw holes from both ends of the light source cover. At the same time, since the light source cover is engaged with the base plate, it is also fixed to the base plate. Furthermore, since the power supply unit is held by the base plate, the base plate, LED board, light source cover, power supply unit, and end caps are all held together as a single unit.

[0076] Regarding the power supply unit, one end of the power supply unit is inserted into the louver section, and the end cap is fixed to the base plate. The other end of the power supply unit is then held in place by the retaining rib of the end cap and fixed to the base plate. The lead wires (not shown) of the LED board are electrically connected to the power supply board via a connector (not shown).

[0077] The LED lighting fixture is now complete. The completed LED lighting fixtures will be packaged and shipped out. Next, we will explain the installation of the LED lighting fixtures. 12. Installation of LED lighting fixtures

[0078] In Japanese homes, lighting fixtures that are directly fixed to the ceiling, known as base lighting, are typically installed using suspension bolts as part of a suspended ceiling structure. The lighting fixture is then secured to the ceiling by fastening nuts to the suspension bolts, thus creating a one-piece fixture. If suspension bolts are not installed, the lighting fixture is directly fixed to the ceiling using screws or other means. These installation methods are common.

[0079] In this embodiment, the LED lighting fixture is installed with the suspension bolts already in place as part of the structure. Since a pair of suspension bolts are positioned near the ceiling with one end pointing downwards, the suspension bolts are passed through a pair of through holes provided in the fixing plate. The fixing plate is tightened from below with nuts, but by moving the suspension bolts into the elongated holes provided in the through holes, the width of the elongated holes is smaller than the nuts, so the fixing plate is locked to the suspension bolts through the elongated holes. Further tightening of the nuts causes the fixing plate to come into contact with the ceiling and be fixed in place.

[0080] The LED lighting fixture body is formed by a base plate, an LED circuit board, a light source cover, a power supply circuit board, a power supply cover, and end caps. Meanwhile, the mounting plate is first fixed to a structure such as a ceiling. Electrical wires for indoor wiring are passed through the wiring holes in the already installed mounting plate. After making electrical connections to the LED lighting fixture body, the installation is completed by attaching the LED lighting fixture body to the mounting plate.

[0081] This section will explain the specific installation process for LED lighting fixtures. With the mounting plate fixed to the ceiling, the outer cover is removed from the LED lighting fixture using the notch in the outer cover. With the outer cover removed, the suspension bolts and nuts are passed through the relief holes in the base plate and the continuation holes in the power supply unit, and the slit-shaped holes in the base plate are passed through the L-shaped claws of the mounting plate. After passing the L-shaped claws through the slit-shaped holes, the base plate and the slit-shaped holes are moved horizontally in the longitudinal direction of the base plate to engage the slit-shaped holes with the L-shaped claws and temporarily fix them in place.

[0082] The base plate and the fixing plate are integrated by screwing the fixing holes in the base plate to the fixing taps in the fixing plate. The fixing plate is fixed to the suspension bolts, and further fixed in contact with the ceiling, so as a result the base plate is fixed to the ceiling.

[0083] Since the indoor wiring is already coming out from the ceiling, the electrical connection is completed by connecting it to the terminal block of the power supply board of the power supply unit through the wiring passage hole in the fixing plate and the guide hole provided in the approximate center of the base plate.

[0084] The state in which the base plate is fixed to the ceiling is equivalent to the state in which the LED lighting fixture is fixed to the ceiling. Since the outer cover is removed, the outer cover is attached to the LED lighting fixture body by fitting the locking claws of the outer cover into the concave grooves provided on the inner wall of the light source cover and locking them in place, thus completing the installation.

[0085] To remove the LED lighting fixture body, pull down the notch on the outer cover with a flathead screwdriver or similar tool, and detach the locking claw located at one end of the outer cover from the recessed groove. By pulling the outer cover off in this manner, the entire locking claw will detach from the recessed groove.

[0086] Now that the outer cover has been removed, to remove the LED lighting fixture itself, unscrew the screws securing the retaining holes and slide the LED lighting fixture in the direction that releases the locking mechanism between the longitudinal L-shaped claws and the slit-shaped holes. Once the L-shaped claws and slit-shaped holes separate, the LED lighting fixture will detach from the mounting plate. Disconnect the indoor wiring connected to the terminal block to complete the removal of the LED lighting fixture.

[0087] To disassemble the LED lighting fixture, the end cap can be detached from the light source cover by removing the screws in the fixing holes of the end cap. Once the end cap is detached, the light source cover and LED board, which are temporarily fixed to the base plate by sliding, can be easily removed. The electron microscope unit is also only temporarily fixed by inserting its connector into the louver section, so it can be easily removed as well.

[0088] As described above, according to the embodiment of the present invention, the installation of the LED lighting fixture is simple, and the assembly and disassembly of the LED lighting fixture body is also easy, enabling significant labor savings in manufacturing and installation.

[0089] In this embodiment, the fixing plate was attached to the suspension bolt, but it is also possible to attach it directly to the ceiling using the mounting holes. The installation of the LED lighting fixture itself is done in the same way.

[0090] As described above, in this embodiment, the fixing plate was formed by sheet metal processing, but it may also be formed by resin molding or the like. Any material that can be fixed to the suspension bolt with a nut is acceptable.

[0091] Furthermore, although the base plate was formed by sheet metal processing, it may also be formed by resin molding or other methods. The important thing is that it can hold and secure the related components.

[0092] Furthermore, although the light source cover was formed by extrusion molding, it may also be formed by injection molding or other methods. It is sufficient that a long shape can be formed and that it is light-transmitting.

[0093] Furthermore, the outer cover is secured to the light source cover with locking claws, creating a detachable structure; however, it could also be formed with a hinge or latch structure. Any structure that allows users to easily attach and detach it is acceptable.

[0094] Although one embodiment of the present invention has been described above, the present invention is not limited to these embodiments, and any design changes that do not depart from the spirit of the invention are also included in the present invention. In other words, various modifications and alterations that can be made by those skilled in the art are also included in the present invention. [Industrial applicability]

[0095] The present invention provides a base lighting fixture that can be installed along the ceiling surface of living rooms, Japanese-style rooms, Western-style rooms, and even offices, factories, corridors, entrances, etc., and is characterized by its simple structure, easy installation, and easy maintenance. [Explanation of Symbols]

[0096] 1 LED board 2 Light source cover 3 Base plate 4 LED lighting fixture body 5 Fixed plate 6 Power supply unit 7 L-shaped claw 8 Through hole 9 Suspension bolts 10 nuts 11 long hole 12 Wiring passage hole 13 Lower end 14 Stop tap 15 Direct mounting holes 16 Escape Hole 17 Inner bend 18 Outer bend 19 Receiving surface 20 Guide hole 21 Slit-shaped holes 22 Screw head 23 stop holes 24 escape holes 25 LED elements 26 Push-up section 27 Power supply cases 28 Insertion part 29 Louver section 30 Power supply board 31 Terminal block 32 Continuing holes 33 Insulating wall 34 Inner wall 35 Transparent surface 36 Outer edge 37 Inner edge 38 Cover Engaging Claws 39 Screw hole section 40 End Caps 41 Inclined edges 42 Fixing hole 43. Outer cover 44 Protective Face 45 Locking claws 46. ​​Protruding claws 47 Concave groove 48 Retaining Ribs 49 Holding Boss 50 Induction recess 51 Notch

Claims

1. An LED lighting fixture comprising: a base plate formed in a substantially flat and substantially rectangular shape; LED substrates arranged in two parallel rows with a gap in the longitudinal direction of the base plate; a light source cover arranged parallel to the LED substrates and covering the LED substrates from below in the longitudinal direction along the LED substrates; a power supply unit formed by a power supply board and a power supply case housing the power supply board, arranged longitudinally between the light source covers; an outer cover extending in the longitudinal direction and detachably positioned between the light source covers, enclosing the power supply unit; and end caps covering both longitudinal ends of the light source covers, wherein the base plate is fixed to a fixing plate fixed to a structure such as a ceiling.

2. The LED lighting fixture according to claim 1, wherein the LED substrate is temporarily fixed by sliding it longitudinally and hooking it onto a plurality of locking parts provided on the base plate, and the base plate is sandwiched by fixing end caps to both ends of the light source cover, while at the same time preventing the LED substrate from disengaging from the locking parts and holding it in a predetermined position.

3. The LED lighting fixture according to claim 2, wherein the power supply unit has one end near the center in the longitudinal direction engaged with a base plate and the other end held by an end cap.

4. The LED lighting fixture according to claim 3, wherein the outer cover has a cross-sectional shape perpendicular to the longitudinal direction, forming a protective surface in a substantially horizontal direction, locking claws extend upward from substantially both ends of the protective surface, sandwiching the power supply unit, and the locking claws are provided with protruding claws facing outward in the horizontal direction, and recessed grooves are provided on the opposing inner walls of the parallel-arranged light source covers so that the protruding claws can be detachably engaged.

5. The LED lighting fixture according to claim 4, wherein a plurality of L-shaped claws are formed on the fixing plate by cutting and bending them so that they are inside the inner wall of the light source cover and outside the power supply case, and slit-shaped holes are provided at opposing positions on the base plate to lock them in place, and the base plate and the fixing plate are attached together.

6. The LED lighting fixture according to claim 5, wherein, for suspension bolts suspended parallel to the structure, the fixing plate is provided with through holes at the same intervals as the suspension bolts, through which the nuts attached to the ends of each suspension bolt can pass; an elongated hole is provided extending from the through holes in the same longitudinal direction of the fixing plate, with a width larger than the diameter of the suspension bolt and smaller than the diameter of the circumscribed circle of the nut; a relief hole is provided in the base plate at a position opposite the through holes and the elongated hole, with a length equal to the combined length of the through holes and the elongated hole and a width equal to the diameter of the through holes; and a continuation hole communicating with the through holes is provided in the power supply unit, with a length equal to the combined length of the through holes and the elongated hole and a width equal to the diameter of the through holes.

7. The LED lighting fixture according to claim 6, wherein the light source cover is formed by extrusion molding, and the cross-sectional shape of a pair of parallel light source covers perpendicular to the longitudinal direction is symmetrical with respect to a vertical line, and the shape can be produced by the same extrusion molding, and in the cross-sectional shape, cover engaging claws are provided symmetrically in parallel facing each other in the longitudinal direction near the center of the base plate, engaging with the inner ends of the parallel light source covers and engaging with the outer ends of the light source covers on the outside of the base plate.

8. The LED lighting fixture according to claim 1, wherein a concave groove is provided in the middle of the inner wall of the light source cover, which has a cross-sectional shape perpendicular to the longitudinal direction, and a screw hole portion with a C-shaped cross-sectional shape is provided on the opposite side thereof, and a fixing hole is provided in the end cap at a position that communicates with the screw hole portion, and the end cap is attached to the screw hole portion, thereby fixing and holding both ends of the light source cover in the longitudinal direction with the end cap.

9. The LED lighting fixture according to claim 8, wherein notches are provided at both ends in the longitudinal direction of the outer cover or at positions opposite the outer cover of the end cap, allowing a tool or the like to be hooked onto them to disengage the protruding claws of the outer cover that are engaged with the concave groove of the light source cover.

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